Learning a language has to be a continuous process. Try to build the habit of learning regularly. The best would definitely be every day, even if it is small, make sure it is regular. The more you expose yourself to a language, the more it will become part of your life. By doing so, you will soon witness the radical change in your progress.
I have myself observed the harm done by the school breaks on my students. I had to go all over again some topics already covered. So do yourself a favour, and make sure your learning becomes part of your life without any day off. Once you hook the fish (a French fish obviously…), don’t let it go!!